Atmospheric air is not pure, it contains other gases, one of them is water in gas phase. In other words, atmospheric air is wet.
However, there is a limit for the maximum moisture that it can contains, and this limit depends on its temperature. The higher
the temperature, the higher the quantity of water it can contain. Thus, if we cool down atmospheric air, we will reach a point
where it cannot longer contain all the water it has, and part of it will condense, usually in small drops. When we reach this
temperature, we say that we have reached the dew point. If the humidity of the air is very high, this dew point will be reached
soon, without having to cool too much. However, if the air is very dry, the dew point temperature will be lower.
Enter the temperature and relative humidity of the air: